Incandescent electric lamp.



Patented May 27,1913;

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I to provide a lam nnromfnnonn, or VIENNA, aosrnmau wanr.

INCANDESCENT ELECTRIC LQMP.

Specification 0! Letters Patent. a pucmdnmea December as, 1911.

Patented Mar 2%13313. Serial No. 667,454.

7 To all whom, it may concern:

Be it known that I, RUDOLF JAHonA, subject of the Emperor of Austria-Hungary, residing at Vienna, Austria-Hungary, have invented certain new and useful Improvements in Incandescent Electric Lamps, of which the following is a specification. j

Heretofore the method of arranging metallic filaments of considerable length within glow lamp bulbs consisted almost exclusively in winding the filament on asupport formed essentially of two supporting spiders in such a manner that the filament is distributed around a cylindrical surface. *The disadvantage of. this arrangement is that the lam radiates-very little light in a downward direction. Other arrangements have been proposedfor the purpose of producing light radiation in a downward direction, but in these cases the lateral radiation is reduced.

The present invention has for its object which will radiate light uniformly in all ateral directions as well as downwardly. This effect is obtained by the arrangement hereinafter described and shown in the accompanying drawing, in which Figure 1 is a perspective View, Fig. 2 a plan view and Fig. 3 is a plan view of a modification.

a designates an axial supporting rod carrying on its upper and lower ends respectively two cross bars- 6 and 0 preferably arranged at right angles to each other.

(1! and d are the leading-in-wires. The cross bars 6 and c are formed with loops 1, 2, 3, 4, 5, 6, 7, 8 for the reception ofthe filament, which extends from all over l8- 2-73-65 to 01. Thus the filament is distributed over a warped surface and there is no position in which the individual sections of the filament cover each other, so that a highly'efiicient distribution of light is obtained.

In some cases it ma be necessary to employ a filament of considerable length and in such cases the'cross bars would have to be considerably extended. This inconvenience is avoided by the modified arrangement) shown in Fig. 3, wherein the cross bars 5 c are provided on each side with a longitudi nal row of small hooks 1, 1 to 8, 8 for the reception of the filament, so that light will be emitted by two parallelwarped surfaces. The filament will then run'from 1 over 8, 2, 7, 3, 6, 4, 5,5, 4, 6',3, 7, 9, 8 to lfi The section of the filament from 1 to 5 deter the section from 5 to 1 determines the in terior light emitting surface Claim.

1. An incandescent lamp com rising two filament supporting crossed mem rs, spaced apart, and a filament. connected with said members at the same andat different rela- Itoive positions from the centers of said memers.

axial support, bars mounted thereon and crossing each other, and a filament extending from the outer end of one bar to the outer end of the other bar, and froni the last named position to a point on the other bar intermediate its ends and center.

3. An incandescent lamp comprising an axial .support, bars mounted thereon and crossing each other, and a filament extending from the outer end of one bar to the named position to a point on the other bar intermediate its ends andcenter and from point on the first named bar.

4. An incandescent lamp comprising a support, two filament supporting members spaced apart along the support and crossing each other and a filament extendin from one bar to the other in a plurality 0 windingsinclined both to the bars and to the support.

my hand in nesses.

Witr ses Josnr RUnAson,

AUGUST noonn.

mines the-exterior light emitting surface and 2. An incandescent lamp comprising an said intermediate point to a corresponding.

outer end of the other bar, and from the last so In testimony. whereof I have hereunto set presence of two subscribing wit- 

